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After every optimization with lock-less buffer pool use dbperf/mod_bubt* to measure throughput and latency improvements along with CPU-profile (pprof.svg)
This does not yield much performance improvements, both build time and memory allocation remains more or less the same. Nevertheless, retaining this implementation.
Right now, bubt-flusher maintains a buffer pool via a channel in bubtflusher:blocks. Replace this with a lock-less buffer pool.
Additionally, replace Snapshot.readbuffers channel with lock-less buffer pool.
Also replace Snapshot:viewcache, Snapshot:curcache with lock-less pool.
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